Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition
The stability of the West Antarctic Ice Sheet is threatened by the incursion of warm Circumpolar Deepwater which flows southwards via cross-shelf troughs towards the coast there melting ice shelves. However, the onset of this oceanic forcing on the development and evolution of the West Antarctic Ice...
Published in: | Communications Earth & Environment |
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Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025967 |
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5025967 2024-06-23T07:45:27+00:00 Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition Uenzelmann-Neben, G. Gohl, K. Hochmuth, K. Salzmann, U. Larter, R. Hillenbrand, C. Klages, J. Afanasyeva, V. Arndt, J. Bickert, T. Bohaty, S. Dziadek, R. Ebermann, B. Ehrmann, W. Esper, O. Frederichs, T. Freudenthal, T. Gebhardt, C. Küssner, K. Kuhn, G. Najman, Y. Pälike, H. Riefstahl, F. Ronge, T. Scheinert, M. Simoes Pereira, P. Smith, J. Spiegel, C. Van de Flierdt, T. Zundel, M. 2022 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025967 unknown info:eu-repo/semantics/altIdentifier/doi/10.1038/s43247-022-00369-x https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025967 Communications Earth and Environment info:eu-repo/semantics/article 2022 ftgfzpotsdam https://doi.org/10.1038/s43247-022-00369-x 2024-05-29T00:03:34Z The stability of the West Antarctic Ice Sheet is threatened by the incursion of warm Circumpolar Deepwater which flows southwards via cross-shelf troughs towards the coast there melting ice shelves. However, the onset of this oceanic forcing on the development and evolution of the West Antarctic Ice Sheet remains poorly understood. Here, we use single- and multichannel seismic reflection profiles to investigate the architecture of a sediment body on the shelf of the Amundsen Sea Embayment. We estimate the formation age of this sediment body to be around the Eocene-Oligocene Transition and find that it possesses the geometry and depositional pattern of a plastered sediment drift. We suggest this indicates a southward inflow of deep water which probably supplied heat and, thus, prevented West Antarctic Ice Sheet advance beyond the coast at this time. We conclude that the West Antarctic Ice Sheet has likely experienced a strong oceanic influence on its dynamics since its initial formation. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic Amundsen Sea West Antarctic Ice Sheet Communications Earth & Environment 3 1 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
The stability of the West Antarctic Ice Sheet is threatened by the incursion of warm Circumpolar Deepwater which flows southwards via cross-shelf troughs towards the coast there melting ice shelves. However, the onset of this oceanic forcing on the development and evolution of the West Antarctic Ice Sheet remains poorly understood. Here, we use single- and multichannel seismic reflection profiles to investigate the architecture of a sediment body on the shelf of the Amundsen Sea Embayment. We estimate the formation age of this sediment body to be around the Eocene-Oligocene Transition and find that it possesses the geometry and depositional pattern of a plastered sediment drift. We suggest this indicates a southward inflow of deep water which probably supplied heat and, thus, prevented West Antarctic Ice Sheet advance beyond the coast at this time. We conclude that the West Antarctic Ice Sheet has likely experienced a strong oceanic influence on its dynamics since its initial formation. |
format |
Article in Journal/Newspaper |
author |
Uenzelmann-Neben, G. Gohl, K. Hochmuth, K. Salzmann, U. Larter, R. Hillenbrand, C. Klages, J. Afanasyeva, V. Arndt, J. Bickert, T. Bohaty, S. Dziadek, R. Ebermann, B. Ehrmann, W. Esper, O. Frederichs, T. Freudenthal, T. Gebhardt, C. Küssner, K. Kuhn, G. Najman, Y. Pälike, H. Riefstahl, F. Ronge, T. Scheinert, M. Simoes Pereira, P. Smith, J. Spiegel, C. Van de Flierdt, T. Zundel, M. |
spellingShingle |
Uenzelmann-Neben, G. Gohl, K. Hochmuth, K. Salzmann, U. Larter, R. Hillenbrand, C. Klages, J. Afanasyeva, V. Arndt, J. Bickert, T. Bohaty, S. Dziadek, R. Ebermann, B. Ehrmann, W. Esper, O. Frederichs, T. Freudenthal, T. Gebhardt, C. Küssner, K. Kuhn, G. Najman, Y. Pälike, H. Riefstahl, F. Ronge, T. Scheinert, M. Simoes Pereira, P. Smith, J. Spiegel, C. Van de Flierdt, T. Zundel, M. Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
author_facet |
Uenzelmann-Neben, G. Gohl, K. Hochmuth, K. Salzmann, U. Larter, R. Hillenbrand, C. Klages, J. Afanasyeva, V. Arndt, J. Bickert, T. Bohaty, S. Dziadek, R. Ebermann, B. Ehrmann, W. Esper, O. Frederichs, T. Freudenthal, T. Gebhardt, C. Küssner, K. Kuhn, G. Najman, Y. Pälike, H. Riefstahl, F. Ronge, T. Scheinert, M. Simoes Pereira, P. Smith, J. Spiegel, C. Van de Flierdt, T. Zundel, M. |
author_sort |
Uenzelmann-Neben, G. |
title |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_short |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_full |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_fullStr |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_full_unstemmed |
Deep water inflow slowed offshore expansion of the West Antarctic Ice Sheet at the Eocene-Oligocene transition |
title_sort |
deep water inflow slowed offshore expansion of the west antarctic ice sheet at the eocene-oligocene transition |
publishDate |
2022 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025967 |
geographic |
Antarctic Amundsen Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Amundsen Sea West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelves |
op_source |
Communications Earth and Environment |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s43247-022-00369-x https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025967 |
op_doi |
https://doi.org/10.1038/s43247-022-00369-x |
container_title |
Communications Earth & Environment |
container_volume |
3 |
container_issue |
1 |
_version_ |
1802639812515069952 |